qstommyshu commented on code in PR #15743:
URL: https://github.com/apache/datafusion/pull/15743#discussion_r2054082743
##########
datafusion/sql/tests/sql_integration.rs:
##########
@@ -4673,16 +4675,17 @@ fn test_infer_types_from_predicate() {
}
#[test]
-fn test_infer_types_from_between_predicate() {
- let sql = "SELECT id, age FROM person WHERE age BETWEEN $1 AND $2";
+fn test_prepare_statement_infer_types_from_between_predicate() {
+ let sql = "PREPARE my_plan AS SELECT id, age FROM person WHERE age BETWEEN
$1 AND $2";
let plan = logical_plan(sql).unwrap();
assert_snapshot!(
plan,
@r#"
- Projection: person.id, person.age
- Filter: person.age BETWEEN $1 AND $2
- TableScan: person
+ Prepare: "my_plan" []
Review Comment:
Hi @brayanjuls ,
the reason why this happen is there is no parameters being passed to the
sql, but the sql itself contains positional arguments like `$1` and `$2`,
please refer to
https://datafusion.apache.org/user-guide/sql/prepared_statements.html#inferred-types.
The simple way you can fix it is by adding the position arguments type to
the `sql` like how it was done in
[`test_prepare_statement_to_plan_one_param`](https://github.com/apache/datafusion/blob/2f7cc9beb15c467320e5baf75def0d79f9558ee2/datafusion/sql/tests/sql_integration.rs#L4828-L4855).
If you want to dig into the details about it, you can check [how planner parse
`PREPARE`
statement](https://github.com/apache/datafusion/blob/2f7cc9beb15c467320e5baf75def0d79f9558ee2/datafusion/sql/src/planner.rs#L194-L208)
and transfer it into a logical plan.
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